Question on rubberized roof patch

I have a concrete tile roof which butts up against a vertical masonry
wall (imagine the roof ending at the edge of a chimney situation). The
asphalt cement flashing that comes up from below the tiles are sort of
bubbling and peeling off.
So last week I bought a bunch of those rubberized roof patch that you
apply using a caulking gun. I first used a utility blade to cut off
all the loose peeling areas and exposed the raw masonry. Then I
applied a thin layer of this black tar looking like roof patch. Then I
applied a fabric mesh over it, after that another coat,
Now I have two questions.
(1) Since this material is black, I need to paint over it as my house
is white. Do I need specialized paint? I am thinking of using the
Elastomeric paint which stretches more then normal paint? Is that the
right kind to use? If so, do I need to prime it? I imagine this being
rubbery it will be hard to paint on and need a few coats to cover the
black?
(2) My repair is all on the wall surface where the previous asphalt
flashing is. Now there is a joint between the wall and the tiles. I
wonder do I leave that joint alone? Do I caulk it? or Should I apply
the same rubberized roof patch over the joint and spread it over layer
I already have on the vertical wall? I think since the tiles and wall
moves with the temperature and settlement, if I use the same patch it
might "pull" the layer off the wall as the joint moves. May be I
better caulk it with another Elastomeric sealer (silicon based?) and
not use the same material?
Thanks in advance,
MC

It's a bit hard (for me anyway) to tell from your description exacly
how your repair was performed (sounds like it might have been a repair
of a pervious repair) but usually the flashing from a tile roof to a
wall does not depend on this sort of seal - if your parch left gaps
were there were none before you might find these helpful:

Log in

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.